rfnoc: move chdr_ctrl_xport::make() out of header

GCC 16 eagerly instantiates std::_Sp_counted_ptr_inplace<chdr_ctrl_xport>
in every TU that includes chdr_ctrl_xport.hpp with the inline make()
definition. This causes the destructor to be referenced in TUs that do
not link against chdr_ctrl_xport.cpp (e.g. client_zero_test), resulting
in undefined reference linker errors.

Fix by moving make() from the inline header definition into the .cpp
file, so std::make_shared<chdr_ctrl_xport> is only instantiated where
~chdr_ctrl_xport() is also defined.

host/lib/include/uhdlib/rfnoc/chdr_ctrl_xport.hpp

@@ -49,18 +49,7 @@ public:
         size_t num_send_frames,
         size_t num_recv_frames,
         size_t send_frame_size,
-        disconnect_callback_t disconnect)
-    {
-        return std::make_shared<chdr_ctrl_xport>(io_srv,
-            send_link,
-            recv_link,
-            pkt_factory,
-            my_epid,
-            num_send_frames,
-            num_recv_frames,
-            send_frame_size,
-            disconnect);
-    }
+        disconnect_callback_t disconnect);
 
     /*!
      * Make a chdr_ctrl_xport

host/lib/rfnoc/chdr_ctrl_xport.cpp

@@ -13,6 +13,27 @@ using namespace uhd::rfnoc;
 using namespace uhd::rfnoc::chdr;
 using namespace uhd::transport;
 
+chdr_ctrl_xport::sptr chdr_ctrl_xport::make(io_service::sptr io_srv,
+    send_link_if::sptr send_link,
+    recv_link_if::sptr recv_link,
+    const chdr::chdr_packet_factory& pkt_factory,
+    sep_id_t my_epid,
+    size_t num_send_frames,
+    size_t num_recv_frames,
+    size_t send_frame_size,
+    disconnect_callback_t disconnect)
+{
+    return std::make_shared<chdr_ctrl_xport>(io_srv,
+        send_link,
+        recv_link,
+        pkt_factory,
+        my_epid,
+        num_send_frames,
+        num_recv_frames,
+        send_frame_size,
+        disconnect);
+}
+
 chdr_ctrl_xport::chdr_ctrl_xport(io_service::sptr io_srv,
     send_link_if::sptr send_link,
     recv_link_if::sptr recv_link,